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<title>javax.print.event package</title>
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Package javax.print.event contains event classes  and listener interfaces.
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They may be used to monitor both print services (such as printers going
on-line &amp; off-line), and the progress of a specific print job.
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Please note: In the javax.print APIs, a null reference parameter to methods 
is incorrect unless explicitly documented on the method as having a meaningful
interpretation. Usage to the contrary is incorrect coding and may result
in a run time exception either immediately or at some later time.
IllegalArgumentException and NullPointerException are examples of
typical and acceptable run time exceptions for such cases.
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@since 1.4
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